What is the integral of (1-3x)^9 ?

The integral of (1-3x)^9 is -1/30 (1-3x)^{10}+C

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integral of (1-3x)^9

\int (1 - 3 x)^{9} d x

- \frac{1}{30} (1 - 3 x)^{10} + C

Solution steps

\int (1 - 3 x)^{9} d x

Apply u-substitution

= \int - \frac{u ^{9}}{3} d u

Take the constant out:

\int a \cdot f (x) d x = a \cdot \int f (x) d x

= - \frac{1}{3} \cdot \int u^{9} d u

Apply the Power Rule

= - \frac{1}{3} \cdot \frac{u ^{10}}{10}

Substitute back

u = 1 - 3 x

= - \frac{1}{3} \cdot \frac{( 1 - 3 x ) ^{10}}{10}

Simplify

- \frac{1}{3} \cdot \frac{( 1 - 3 x ) ^{10}}{10} : - \frac{1}{30} (1 - 3 x)^{10}

= - \frac{1}{30} (1 - 3 x)^{10}

Add a constant to the solution

= - \frac{1}{30} (1 - 3 x)^{10} + C

What is the integral of (1-3x)^9 ?
The integral of (1-3x)^9 is -1/30 (1-3x)^{10}+C